A male screw and female screw made of matte black polypropylene resin. The thread is made of steel, the surface is trivalent chromate treated and made of stainless steel. Operating temperature max80° C min-20° C

Male screw made of black nylon resin. The thread is made of steel, the surface is trivalent chromate treated and made of stainless steel. The cap is silver aluminum. Operating temperature max80° C min-20° C

It is a male screw made of polished black polypropylene resin. The thread part is made of steel, and the surface treatment is made by trivalent chromate treatment. Operating temperature max80° C min-20° C

It is made of matte black nylon (glass fiber reinforced) resin. The male screw is made of steel, and the surface is treated with trivalent chromate and made of stainless steel. Operating temperature max80° C min-20° C

By reducing the friction of the seating surface, it is possible to obtain an equivalent sealing force with half the effort compared to knobs of the same size. Since the tightening seat surface does not rotate, the workpiece will not be scratched. Axial bearing inside the bearing surface.

The feeling of the operation is nice due to the force of the spring, and when removing the door using that same force, you can flip up the knurled knob, allowing you to judge the disengagement point and improve its efficiency.Since the knob part is fixed to the detaching position of the door, the knob does not come off completely from the door and the work can be finished quickly.